gas mixing in a t-shape micro mixer has been simulated using the direct simulation monte carlo (dsmc) method. it is considered that the adequate mixing occurs when the mass composition of the species, co or n2, deviates below 1 % from their equilibrium composition. the mixing coefficient is defined as the ratio of the mixing length to the main channel’s height. as the inlet kn increases, while ...

In this paper the experimental demonstration of a Silicon-on-Insulator Reflective Arrayed Waveguide Grating (R-AWG) is reported. The device employs one Sagnac loop mirror per arm in the array, built with a 1x2 input/outputs, 50:50 splitting ratio, Multimode Interference coupler, for total reflection. The spectral responses obtained are compared to those of regular AWGs fabricated in the same di...

In this work we investigate the synthesis of Bragg reflectors consisting either of AlN/GaN or of (Al,In)N/GaN by plasma-assisted molecular beam epitaxy (MBE). In addition, we study the impact of Si-doping on the surface morphology and the structural and electrical properties of AlN/GaN Bragg reflectors in order investigate the feasibility of obtaining vertically conducting Bragg mirrors. The st...

Articles you may be interested in Lowthreshold surfaceemitting laser diodes with distributed Bragg reflectors and current blocking layers Appl.

A classical electromagnetic calculation of the lifetime of an emitting electric dipole near a material slab is presented. The lifetime is deduced from the imaginary part of the electric field Green's tensor associated with the stratified medium. The method is applied not only to the well known case of metallic reflectors, but also to magnetic reflectors and to negative refractive index slabs. T...